(b)(4).Additional information received from the customer states "there was a tip in the blood vessel with clot, so only a small incision was needed".The customer returned a lidstock, ptd rotator and orange lumen for investigation.The customer did not return the ptd catheter, basket or tip.The orange lumen was observed to have twisting and stress marks, which is caused when the ptd encounters resistance while being rotated.The orange lumen measured 1.880" which is within specification on 1.860-1.890" per basket lumen product drawing.Functional testing was performed by pressing the black on/off power button on the ptd rotator.Ptd turned on/off normally.A device history review was completed with no relevant findings.The current instructions-for-use (ifu) provided with this product provides guidance on the use of this product and warns the user to ensure the exposed portion of the catheter remains straight at all times to aid in successful basket deployment and that the catheter assembly is not to be advanced forward during activation.It also states that potential fatigue failure of the torque cable and fragmentation basket may occur with prolonged activation and recommends a limited activation time of 30-60 seconds.It warns that the rotating basket is to be withdrawn in the deployed position prior to reaching the sheath at a recommended rate of 1-2cm/second when sharp radii is encountered and that the catheter is not to be advanced forward during activation.The customer report of a damaged ptd tip/lumen was confirmed based on visual investigation of the received sample.The orange lumen was twisted and showed signs of stress.This damage is consistent with what occurs when the ptd encounters resistance while being rotated.Based on the condition of the returned sample and the evidence of use, it was determined that unintentional user error caused or contributed to this event.Teleflex will continue to monitor and trend reports of this nature.
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